Clamp.



No. 831,845. PATENTED SEPT. 25, 1906.

- E. R. ERIGKSON.

CLAMP.

APPLICATION FILED 1113.24, 1906.

mwno ATTORNEYS UNITED STATES PATENT OFFICE.

ERICK R. ERICKSON, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO HENRYWYNELL, OF NET/V YORK, N. Y.

CLAMP.

Specification of Letters Patent.

Patented Sept. 25, 1906.

To all whom, it may concern:

Be it known that I, ERICK B. ERICKSON, a citizen of the United States,and a resident of the city of New York, borough of the Bronx, in thecounty and State of New York, have invented a new and Improved Clamp, ofwhich the following is a full, clear, and exact description.

This invention relates to clamps.

The object of the invention is to produce a clamp of simpleconstruction, presenting clamping-faces the distance between which maybe readily adjusted to receive objects of different thicknesses.

The invention is especially useful for the purposes of a joiner orcabinet-maker to hold members which are being glued together.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings, formin a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of the clamp, representing the same asapplied to a supporting-rail. Fig. 2 is a vertical longitudinal sectionthrough the parts shown in Fig. 1, and Fig. 3 is a cross-section takenon the line 3 3 of Fig. 1.

Referring more particularly to the parts, 1 represents a portion of arail. The clamp comprises a saddle-bracket 3, presenting a horizontalplate 4, formed near its extremities into seats 5, which rest upon theupper face of the rail, as shown, the said plate 4 being formedpreferably integrally with an upwardly-projecting flange 6. Thesaddlebracket 3 is preferably reinforced by a rib or web 7, as shown. Ata suitable point on the body of the saddle-bracket and on each sidethereof I attach links or levers 8 by pivot-pins 9. These levers hangdownwardly at the sides of the rail and are formed at their lowerextremities into two ears 10 and 11, the said ears being provided withlaterally-displaced eyes receiving pins 12 and 13. The pin 12 affordsmeans for attaching a shoe 14 to the ear, the said shoe consistingsubstantially of a plate the inner face whereof rests against the lowerface of the rail 1, as shown. To the pin 13 is attached a second shoewhich lies upon the upper face of the rail. This shoe 15 is formed withintegral extensions which are disposed at the sides of the rail anddepend downwardly, so that the shoes 14 and 15 constitute stirrups hungupon the upper member which is to be clamped. The lower members of theshoe 15 attach pivotally to the pins 13.

Adjacent to the saddle-bracket 3 I provide a saddle 17, which is formedwith a single seat 18, which rests upon the upper side of the rail 1.The forward extremity of-this saddle 17, which lies nearest to thebracket 3, is formed into a hub 19, through which passes aclamping-screw 20. Just beneath the hub 19 the saddle 17 is pivotallyattached, by means of a suitable pin 21, to a lever 22, which is similarin construction to the link 8 already described, presenting a pair ofears 23 and 24 at the lower extremity thereof, as shown. By means of asuitable pin the ear 23 is connected with a shoe 25, which is similar inconstruction to the shoe 14 and disposed adjacent thereto. A second shoe26 is provided similar to the shoe 15, the same having extensions 27,which are pivotally attached by a suitable pin to the ear 24. The shoes25 and 26 present substantially -flat clamping-faces which come againstthe side of the rail.

Upon the extremity of the clamping-screw a swivel-head 28 is provided,which abuts against the substantally' vertical outer face of the flange6 of the saddle-bracket 3.

It should be observed that the shoe 15, which is connected with thesaddle-bracket 3, lies in a recess 29, which is formed between the seats5.

Vith the construction described it should be understood that if theclamping-screw 20 be tightened so that it tends to force apart thesaddle-bracket 3 and the saddle 17 these members tend to slide upon theupper face of the rail 1, so that the pins 9 and 21 will be moved in thedirection of the arrows. In this way a powerful force is exerted uponthe links 8 and 22. In this way the shoes 14 and are forced upwardly,while the shoes 15 and 26 are pressed downwardly, so that the rail isfirmly clamped between these parts, as will be readily understood. Byreason of the relative length of the links or levers 8 and 22 ascompared with the arm or distance between the pins 12 and 13 and thecorresponding pins of the link 22 it should be understood that a verypowerful leverage is obtained, enabling the parts to be pressed togetherwith great force.

The pieces to be clamped together will be applied between thesaddle-bracket 3 and the swivel-head 28. Either of these members may bereadily slid along on the rail 1 to make a space of any size to receivethe pieces to be clamped and also enabling the work-to be held at anydesired point on the rail. When the clamping-screw 20 is screwed up toclamp the work, the force which it exerts also operates to hold thesaddle-bracket and saddle rigidly on the rail. 7

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a clamp, in combination, a pair of shoespresenting clamping-faces adapted to press opposite sides of a rail, asecond pair of shoes presenting clamping-faces and adapted to pressopposite sides of the same rail, levers pivotally attached respectivelyto said pairs of shoes, and a connection between said levers affordingmeans for clamping all of said shoes simultaneously.

2. In a clamp, in combination, a saddlebracket and a saddle adapted torest upon the same face of arail to be clamped, apair of shoes adaptedto rest upon the aforesaid face, a second pair of shoes adapted to restupon the opposite face of the rail, links pivotally attached to saidshoes and extending transversely of the rail, said links being pivotallyattached to said saddle-bracket and said saddle, and means for forcingsaid saddle-bracket and said saddle apart.

3. In a clamp of the class described, in combination, a saddle-bracketpresenting seats on the under side thereof, adapted to rest upon oneface of a rail and presenting an opening between said seats, a shoelying in said opening and having extensions extending transversely ofthe sides of the rail, a second shoe adapted to press the side of therail opposite said saddle-bracket, links attached pivotally to saidsecond shoe and to said extensions of said first shoe, said links being5 pivotally attached to said saddle-bracket,

face of a rail, links pivotally attached to said saddle-bracket and saidsaddle and extending to the opposite side ofthe rail, shoes pivotallyattached to said links and adapted to press the side of the railopposite to said saddles, other shoes resting on the face of the railadjacent to said saddles and having extensions extending to the oppositeside of said members, said extensions being pivotally attached to saidlinks, and means for forcing said saddle-bracket and said saddlelongitudinally of the rail and in different directions.

5. In a clamp, in combination, a rail, a pair of saddles slidablymounted on said rail, shoes engaging the faces of said rail, linksconnecting said saddles with said shoes and constituting levers forapplying said shoes to said rail, and means for clamping the workbetween said saddles, whereby the outward pressure of said saddles aplies said clamps.

6. In a clamp, in com ination, arail, a

pair of saddles slidably mounted on said rail,

shoes engaging the faces of said rail, links connecting said saddlesWith said shoes and constituting levers for applying said shoes to saidrail, and a clamping-screw carried by one of said saddles and adapted tohold the workagainst the opposite saddle.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ERICKR. ERICKSON.

Witnesses:

HENRY WYNELL, F. D. AMMEN.

